通风条件对ACQ-D处理杉木中铜固着的加速作用

为了研究在不同相对湿度的热空气后处理过程中，通风条件对胺溶铜季铵盐 D型（ACQ-D）处理杉木中有效成分铜固着的影响，该实验在30%、50%、80% 3个相对湿度条件下，将ACQ-D处理过的杉木置于通风和不通风条件下分别进行热空气处理，然后按照AWPA E11-97流失实验标准进行铜的抗水流失实验，实验结束后，利用原子吸收分光光度计测定试材中残留的铜含量,并计算ACQ-D处理杉木中铜的流失率。结果表明:① 通风条件对铜在木材中的抗流失性影响显著，除相对湿度30%、处理时间为4 h组试件外，通风组试件中铜的流失率均较不通风组有明显降低；② 热空气后处理过程中较高的相对湿度，有利于加速通风条件下ACQ-D处理杉木中铜的固着速率,可迅速提高铜的抗流失性，但对不通风组试件影响不大。 

Effects of circulation condition on copper leaching resistance in ACQ-D treated Chinese fir

In order to clarify the effect of circulation condition on the fixation process of copper with different relative humidity conditions during hot air post-treatment, Chinese fir (Cunninghamia lanceolata Hook) treated by amine copper quat-type D (ACQ-D) was post-treated in three different relative humidity conditions（30%, 50% and 80%） with or without ventilation. After post-treatment, leaching tests were carried out according to AWPA E11-97 and the percentage of copper leached out from the samples was calculated based on the copper amount remained in the samples after leaching tests, which was determined by atomic absorption spectroscopy (AAS). The results show that: 1) Circulation has a significant effect on copper leaching resistance in ACQ-D treated Chinese fir. The percentage of copper leached out in circulation groups decreased more significantly than in non circulation groups, except the group in 30% relative humidity for 4 hours during hot air post treatment. 2) Higher relative humidity accelerates the copper fixation rates in circulation groups during hot air post-treatment and improves the copper leaching resistance in a short time. For the non-circulation groups, the effect of relative humidity is negligible.